/*
 * Copyright 2008-2010 Bay Area Software, Inc.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License. 
 */
package com.bayareasoftware.chartengine.model;

public class NegativeIdGenerator implements IdGenerator {
    private int count = -1;

    public Integer nextID() {
        return count--;
    }

    public static void install() {
        if (IdGeneratorFactory.getGenerator() == null) {
            IdGeneratorFactory.setGenerator(new NegativeIdGenerator());
        }
    }
}
